Answer:
The maximal margin of error associated with a 95% confidence interval for the true population mean is 2.238.
Step-by-step explanation:
We have given,
The sample size n=42
The sample mean 
The population standard deviation 
Let 
be the level of significance = 0.05
Using the z-distribution table,
The critical value at 5% level of significance and two tailed z-distribution is
The value of margin of error is
The maximal margin of error associated with a 95% confidence interval for the true population mean is 2.238.
Answer:
85% of the job is finished.
Step-by-step explanation:
The way to find the percentage is to divide 119 by 140, which will come out to be .85.
Multiply .85 by 10 to have it as a whole number for the percentage.
I have no idea ☠️ i just need to answer questions to be able to ask questions
Answer:
1894+x^2
Step-by-step explanation:
1894+x^2
41 squared IS 1,681.
Adding 213 makes it 1894.
And you end up with the expression 1894+x^2
Hope this helps!
Answer:
A = (x + 7)(x + 9)
Step-by-step explanation:
Let the width w = x
then length l = w + 4 = x + 4
Area = length x width
= x(x+4)
Then the the width is increased by 7 units and the length increased by 5 units.
w = x + 7
l = (x + 4) + 5 =x + 9
A = (x + 7)(x + 9)
